monkhorst



H. G. MONKHORST.

. PACKING MACHINE. 1,324,166.

APPLICATION FILED JULY 25.1919.

Patented Dec. 9,1919. 3 SHEETS-SHEET ldo 7\ o u I :3.

f/er'manua (J'eruraQ/J Monk/zomlf p M/VE/V 70/? ATTORNEY H. G. MONKHORST.

PACKING MACHINE. APPLICATION FILED JULY 25. I939.

Patented Dec. 9,1919.

3 SHEETSSHEET,2

.l M 1 l (ll l m m HWMF A TTOHNE V H. G. MONKHORST.

PACKING MACHINE.

APPLICATION FILED JULY 25. 919.

1,324,166. Patented Dec. 9,1919.

3 SHEETS-SHEET 3- fiermanus Gerardus Monk/rarlsf IIVVENTOR A TTORNEY UNITED STATES PATENT onmon.

HERMANUS GERARDUS MONKHORST, OF DELFT, NETHERLANDS.

PACKING-MACHINE.

To all whom it may concern.

Be it known that I, HERMANUS GERARDUS MONKHORST, a subject of the Queen of the Netherlands, residing at Delft, Netherlands, have invented certain new and useful Improvements in Packing-Machines, of which the following is a specification.

My present invention relates to machines for packing fatty, greasy, highly hygroscopic or similar substances such as yeast, butter, margarine, etc., substantially in the form of rectangular prismatic. or parallelepipedic blocks of predetermined size.

The primary object of my invention is to prevent the material to be packed from adhering to some partof the machine which, especially in the case of yeast, might give rise to deterioration and infection of the material, and to interference with the proper working of :the apparatus. With this and other objects in view my novel construction comprises a plurality of mechanisms regularlyspaced apart, about an intermittently rotary shaft, eachmechanism being adapted to hold a block with a sheet of paper or the like partly wrapped around 1t and convey same to members for successively folding said sheet all around the block, and formed as grippers adapted to reciprocate radially with respect to the shaft so as to be adapted to pick up a block suitably supported outside the machine.

An embodiment of my invention is 1llustrated in the annexed drawing in which:-

Figure 1 is a somewhat-diagrammatic elevational view of the machine,

Fig. 2 is an elevation partly in section along Y-Y in Fig.3 of part of the machine, includinga gripper;

Fig. 3 is a sectional view along X-X in Fi 2' M a .1 Fig.2: is a sectional view along ZZ in Fig. 3;

Fig. 5 is an elevation partly in sectionof a paper clip adapted for-use in connection with my new apparatus.

The substance to be packedmust be .supposed to be periodically delivered in the form of rectangular prismatic or parallelepipedic blocks on to a band conveyer 1 having intermittent motion in a direction at right angles to the plane of the drawing. Said conveyer moves the blocks vertically below a four-armed spider 2 adapted to intermit- Specification of Letters Patent.

Application filed July 25, 1919. SerialNo. 313,407.

tently revolve..about a horizontal shaft 3 through angular distances of 90 each, it belng understood that the conveyer 1 should be properly timed with respect to the sides recesses for receiving the guide-bars 7 At the same sides of said plate eyes 10 are provided for receiving bolts 11 to which pressure plates 12 are hinged. The said pressure plates are loaded by springs. 13 hearing with one end against theinner side of the plates 12 and with their other ends against a bracket 14 secured to the plate 9, m'such a manner that those portions of the plates 12 that are located at the outside of the bolts 11 are forced to one another. The springs 13 are thrown around bolts 15 passing through holes in the bracket 14 and engaged by coiled springs 16 connected at 17 with the spider 2.

At the side of each gripper the spider 2 has secured to it a paper clip 18. Said clip. comprises two aws 20, 21 of which the jaw 2Q may be fixed in position on a bolt 19. (see Fig. .5), a spring 22 tending to keep the jaws closed. Secured to the jaw 21 is an arm 23 adapted to cooperate with one of two stop members 24, 25 adjustably mounted on the frame in such a manner that when passing along said members the jaw 21 is forced away from the jaw 20 against the action of spring 22. a

In the close proximity of the stop member 24 opens a chute 26 through which the packing paper 27 from a a suitably supported roller is periodically fed to the clip 18, knives 28 being provided to cut the paper into sheets of the required size. The said paperfeeding device is so constructed that the moment when the jaws 20, 21 are moved from one another by the engagement of the arm 23 with the member 24: a sheet of paper falls out of the chute 26; but the details of construction of said mechanism are of no importance as far as the present invention is concerned.

The further construction of my packing machine will be described hereinafter when explaining its operation.

The spider 2 after having rotated through an angular distance of 90 assumes a position wherein one of the grippers is vertically above the conveyer 1 which at such moment is stationary, the clip 18 cooperates with the stop niember24l in such a manner that the jaws 20, 21 are kept at a suitable distance from one another. In this moment the knife '28 cuts a sheet of suitable size from the packing paper 27 whereby said sheet enters theclip 18. As soon as the spider 2 now "begins to rotate in the direction of the arrow A the arm 23 disengages the stop member-24 whereby the jaws 20, 21 grip the sheet of paper between them and sald sheet is obliged to follow the rotary motion of the spider. In the meantime one of the blocks (a) on the conveyer 1 has moved into position vertically below the spider 2 so that if the spider has completed its rotation through 90 and come to restthe gripper located at the left hand side of the said clip 18 assumes a position vertically above the said block. The sheet of paper gripped between the jaws 20, 21 of said clip 18 now evidently rests on the top of block a with two flaps depending at either side of the block, it being understood that at such moment the sheet of paper has been released by the clip 18 owing to the stop member 25 having forced the jaws 20, 21 from one'another. At this moment compressed air is admitted on the inner face of the-piston of the said gripper by which the piston 5 is radially forced outward and the pressure plates 12 moved downward closely along the sides of the block a, thereby folding the depending flaps smoothly over these sides. The springs 13 are adapted to press the plates 12 with suitable force against the sides of the block so that if the admission of compressed air is interrupted and the air behind the piston discharged the block a is lifted by the action of the springs 16 and assumes the position a It is clear that the gripper does not contact directly with the block to be packed, as a sheet of packing paper is placed between the block and the gripper from the outset. During the following rotation of the spider 2through 90 the block a is always gripped in an invariable position relative to the said gripper, so that there is no objection to printing the packing paper immediately be fore the same is folded around the block provided the ink be printed on that face of the paper which when wrapped around the block is outside, and on that part of the sheet which is intended to cover the top face of the block. It will be understood that in this case the ink is protected during a suficiently long time from contact with any part moving with respect to the block, and that it may have dried hard at the end of the operation. V

After the spider 2 has rotated through 90 andv come to rest with the block a; in the position indicated by (6 a plate 29 actuated by compressed air moves upwardly, thereby folding the'lower depending flap of the pack ing paper over that side of the block which on the conveyor 1 formed the bottom. The said plate 29 is preferably provided with a plurality of very narrow outlets through which compressed air is discharged, by which the said flap of the packing paper is kept in contact with the block until the next rotation through 90 of the spider has commenced. During this rotation the block moves without any appreciable friction along a stationary cylindrical plate 30 which is concentric with the shaft 8 and located at such a distance from said shaft as to cause the upper depending flap of the packing paper to be folded over the first named flap, so that when the block arrives in the position a the sameis covered by the packing paper both at bottom and top and at its two sides. I When the spider 2 is stationary with the block in the position a two folding plates 31, 32 are successively moved in a horizontal, and a vertical direction respectively, closely along the front and the rear face of the block, by which the paper is folded inward over the said faces along the right hand edge and the top edge.

During the next revolution through 90 the block is moved closely along two stationary plates 33, 3st having for their purpose to fold the paper inwardly over front and rear faces along the. remaining edges so that the block whenarriving'in its position a is entirely packed, after which it is forced out ofthe machine by means of a pressing cylinder 35. I

The drawingidoes not show in detail the manner in which the spider 2 is intermit tently revolved andthe compressed air actuates the various pistons at the proper times, it being understood that these means do not form part of the invention. It may be stated, however, that in the example illustrated the distribution of the compressed air is effected by a plurality of valve chests 36, cams 37, and the necessary piping, the said cams being driven by a shaft 38 which also drives the shaft 3 ofthe spider.

The clips 18 may be provided with electricalcontacts 39, 40 (see Fig. 5.) so arranged that when the jaws 20, 21 are forced into engagement by the spring 22 an electrical clrcuit 1s closed whenever a sheet of paper should have failed to fall between said jaws. block with paper, said gripper adapted to The closure of said circuit energizes an elec reciprocate radially and pick up the block tromagnet adapted to stop the machine. covered by the sheet of packing paper.

What I claim as my invention is: 2. A packing machine as claimed in claim a 1. A packing machine comprising an in- 1, in which the gripper comprises a central 15 termittently rotating shaft a plurality of plate and two sides plates pivoted thereto grippers spaced apart around said shaft and having their working faces yieldingly means for conveying a block of the material pressed toward one another. to be packed to a position adjacent one of In testimony whereof I aflix my signature. 30 the grippers, and means for covering said HERMANUS GERARDUS MONKHORST. 

